28806440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1787}}^1$

素因数の和:1842

約数の個数: 64

約数和(自身を含む): 72092160

約数和(自身を除く): 43285720

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 52, 62, 65, 104, 124, 130, 155, 248, 260, 310, 403, 520, 620, 806, 1240, 1612, 1787, 2015, 3224, 3574, 4030, 7148, 8060, 8935, 14296, 16120, 17870, 23231, 35740, 46462, 55397, 71480, 92924, 110794, 116155, 185848, 221588, 232310, 276985, 443176, 464620, 553970, 720161, 929240, 1107940, 1440322, 2215880, 2880644, 3600805, 5761288, 7201610, 14403220, 28806440]

約数ペア:

[(1, 28806440), (2, 14403220), (4, 7201610), (5, 5761288), (8, 3600805), (10, 2880644), (13, 2215880), (20, 1440322), (26, 1107940), (31, 929240), (40, 720161), (52, 553970), (62, 464620), (65, 443176), (104, 276985), (124, 232310), (130, 221588), (155, 185848), (248, 116155), (260, 110794), (310, 92924), (403, 71480), (520, 55397), (620, 46462), (806, 35740), (1240, 23231), (1612, 17870), (1787, 16120), (2015, 14296), (3224, 8935), (3574, 8060), (4030, 7148)]